盾构开挖引起建筑物基础沉降计算方法的研究

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• 英文论文题名：Study on the Calculation Method of Building Foundation Settlements by Shield Excavation Construction
• 论文作者：魏纲 ; 王霄 ; 祝峻 ; 丁智
• 英文论文作者：WEI Gang ; WANG Xiao ; ZHUJun ; DING Zhi ; Department of Civil Engineering ; Zhejiang University City College ; Institute of Geotechnical Engineering ; Zhejiang University ; Quality Supervision Station of Construction Engineering of Hangzhou Zhijiang National Tourist Holiday Resort
• 年：2016
• 作者机构：浙江大学城市学院土木工程系;浙江大学建筑工程学院;杭州之江国家旅游度假区建设工程质量安全监督站;
• 论文关键词：盾构隧道 ; 建筑物 ; 基础沉降 ; 土体损失
• 英文论文关键词：Shield tunnel ; Building ; Foundation settlement ; Ground loss
• 会议召开时间：2016-10-24
• 会议录名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会论文集
• 语种：中文
• 分类号：TU433;U455.43
• 学会代码：OGTY
• 会议名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会
• 会议地点：中国四川成都
• 主办单位：中国土木工程学会隧道及地下工程分会
• 学会名称：中国土木工程学会
• 页数：11
• 文件大小：878k
• 原文格式：O
• 会议级别：全国

摘要

盾构施工穿越上部既有建筑物时,形成的沉降槽与无建筑物时存在明显差异。欧阳文彪利用Verruijt和Booker解推导了盾构施工引起的地表处建筑物沉降计算公式,但假定隧道周围土体均匀径向收缩。本文采用盾构法隧道统一土体移动模型解,考虑建筑物基础刚度、基础埋深及后行隧道施工引起的土体沉降曲线不对称,对欧阳文彪解进行了修正,并将二维解拓展到了三维解。将本文的建筑物二维沉降计算值与实测值、欧阳文彪解和有限元模拟值进行了比较,对建筑物三维沉降变化进行了算例分析,同时分析了建筑物等效弹性模量E_1、隧道轴线埋深h和双线隧道轴线距离L对建筑物沉降的影响。研究结果表明:与欧阳文彪解相比,本文方法计算值与实测值、有限元模拟值更加吻合;基础沉降随着E_1、h、L的增大而减小,建筑物的三维沉降可以采用统一土体移动模型解进行分析。
Forming of settlement trough is apparent difference between the case of the presence of ground surface buildings and the ground surface without building situation under shield construction.Considering the influence of the buildings stiffness,Ouyang Wenbiao calculated the surface of buildings subsidence by using Verruijt and Booker solution during shield construction,but he supposed that the soil around the tunnel should shrink evenly to the center,the focus should be fixed and not consider foundation stiffness of buildings.The paper modified the solution of Ouyang Wenbiao,considering uniform ground movement model for shield tunnels and foundation stiffness and depth,and expanded the two-dimensional solution to three-dimensional solution.The calculating-value was compared with measured-value,so does the value of Ouyang Wenbiao and the value of finite element,and the change of threedimensional settlement was analysised through an example.Meanwhile,the effect of the equivalent elastic modulus of buildings E_1,the depth of tunnel axis from the ground h and the distance between tunnel axis L to settlement of foundations is analyzed.The result showed that calculation method of this paper was more similar to the value of measured and the value of finite element than the value of Ouyang Wenbiao and the settlement of foundation was decreasing with the increasing of E_1,h and L.The three-dimensional settlement of buildings can be analysised by using uniform ground movement model for shield tunnels.

引文

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